CSA solar installed my system around 4 years ago they have done a good job.
But with time I realised that the panels are sitting too high, pigeons and vermin make their nest under them.
I called them recently you quote me for a routine maintenance check (everything works fine) and cleaning the panels (11 only) and they quote me $500 !! What a rip off! So I recommend them for installation but not for maintenance, unless you have a bottom less wallet!

Approximate cost: $500

We had a solar system installed by this company in March 2011, and decided to upgrade to a larger system. Our system had been generating enough to cover our electricity bill, but with the upgrade, the electricity company will be paying us. CSA has been around for 20 years, with solar just one arm of their business. We know if we have problems in the future, they will still be around to assist with maintenance. What they say they will do they have delivered, and always on time. Not the cheapest but reliable.

Approximate cost: $7000